/**
 * @file
 *
 * IPv6 addresses.
 */

/*
 * Copyright (c) 2010 Inico Technologies Ltd.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This file is part of the lwIP TCP/IP stack.
 *
 * Author: Ivan Delamer <delamer@inicotech.com>
 *
 * Structs and macros for handling IPv6 addresses.
 *
 * Please coordinate changes and requests with Ivan Delamer
 * <delamer@inicotech.com>
 */
#ifndef LWIP_HDR_IP6_ADDR_H
#define LWIP_HDR_IP6_ADDR_H

#include "lwip/opt.h"
#include "def.h"

#if LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */

#include "lwip/ip6_zone.h"

#ifdef __cplusplus
extern "C" {
#endif

/** This is the aligned version of ip6_addr_t,
    used as local variable, on the stack, etc. */
struct ip6_addr {
    u32_t addr[4];
#if LWIP_IPV6_SCOPES
    u8_t zone;
#endif /* LWIP_IPV6_SCOPES */
};

/** IPv6 address */
typedef struct ip6_addr ip6_addr_t;

/** Set an IPv6 partial address given by byte-parts */
#define IP6_ADDR_PART(ip6addr, index, a, b, c, d)                              \
    (ip6addr)->addr[index] = PP_HTONL(LWIP_MAKEU32(a, b, c, d))

/** Set a full IPv6 address by passing the 4 u32_t indices in network byte order
    (use PP_HTONL() for constants) */
#define IP6_ADDR(ip6addr, idx0, idx1, idx2, idx3)                              \
    do {                                                                       \
        (ip6addr)->addr[0] = idx0;                                             \
        (ip6addr)->addr[1] = idx1;                                             \
        (ip6addr)->addr[2] = idx2;                                             \
        (ip6addr)->addr[3] = idx3;                                             \
        ip6_addr_clear_zone(ip6addr);                                          \
    } while (0)

/** Access address in 16-bit block */
#define IP6_ADDR_BLOCK1(ip6addr)                                               \
    ((u16_t)((lwip_htonl((ip6addr)->addr[0]) >> 16) & 0xffff))
/** Access address in 16-bit block */
#define IP6_ADDR_BLOCK2(ip6addr)                                               \
    ((u16_t)((lwip_htonl((ip6addr)->addr[0])) & 0xffff))
/** Access address in 16-bit block */
#define IP6_ADDR_BLOCK3(ip6addr)                                               \
    ((u16_t)((lwip_htonl((ip6addr)->addr[1]) >> 16) & 0xffff))
/** Access address in 16-bit block */
#define IP6_ADDR_BLOCK4(ip6addr)                                               \
    ((u16_t)((lwip_htonl((ip6addr)->addr[1])) & 0xffff))
/** Access address in 16-bit block */
#define IP6_ADDR_BLOCK5(ip6addr)                                               \
    ((u16_t)((lwip_htonl((ip6addr)->addr[2]) >> 16) & 0xffff))
/** Access address in 16-bit block */
#define IP6_ADDR_BLOCK6(ip6addr)                                               \
    ((u16_t)((lwip_htonl((ip6addr)->addr[2])) & 0xffff))
/** Access address in 16-bit block */
#define IP6_ADDR_BLOCK7(ip6addr)                                               \
    ((u16_t)((lwip_htonl((ip6addr)->addr[3]) >> 16) & 0xffff))
/** Access address in 16-bit block */
#define IP6_ADDR_BLOCK8(ip6addr)                                               \
    ((u16_t)((lwip_htonl((ip6addr)->addr[3])) & 0xffff))

/** Copy IPv6 address - faster than ip6_addr_set: no NULL check */
#define ip6_addr_copy(dest, src)                                               \
    do {                                                                       \
        (dest).addr[0] = (src).addr[0];                                        \
        (dest).addr[1] = (src).addr[1];                                        \
        (dest).addr[2] = (src).addr[2];                                        \
        (dest).addr[3] = (src).addr[3];                                        \
        ip6_addr_copy_zone((dest), (src));                                     \
    } while (0)
/** Safely copy one IPv6 address to another (src may be NULL) */
#define ip6_addr_set(dest, src)                                                \
    do {                                                                       \
        (dest)->addr[0] = (src) == NULL ? 0 : (src)->addr[0];                  \
        (dest)->addr[1] = (src) == NULL ? 0 : (src)->addr[1];                  \
        (dest)->addr[2] = (src) == NULL ? 0 : (src)->addr[2];                  \
        (dest)->addr[3] = (src) == NULL ? 0 : (src)->addr[3];                  \
        ip6_addr_set_zone((dest),                                              \
                          (src) == NULL ? IP6_NO_ZONE : ip6_addr_zone(src));   \
    } while (0)

/** Copy packed IPv6 address to unpacked IPv6 address; zone is not set */
#define ip6_addr_copy_from_packed(dest, src)                                   \
    do {                                                                       \
        (dest).addr[0] = (src).addr[0];                                        \
        (dest).addr[1] = (src).addr[1];                                        \
        (dest).addr[2] = (src).addr[2];                                        \
        (dest).addr[3] = (src).addr[3];                                        \
        ip6_addr_clear_zone(&dest);                                            \
    } while (0)

/** Copy unpacked IPv6 address to packed IPv6 address; zone is lost */
#define ip6_addr_copy_to_packed(dest, src)                                     \
    do {                                                                       \
        (dest).addr[0] = (src).addr[0];                                        \
        (dest).addr[1] = (src).addr[1];                                        \
        (dest).addr[2] = (src).addr[2];                                        \
        (dest).addr[3] = (src).addr[3];                                        \
    } while (0)

/** Set complete address to zero */
#define ip6_addr_set_zero(ip6addr)                                             \
    do {                                                                       \
        (ip6addr)->addr[0] = 0;                                                \
        (ip6addr)->addr[1] = 0;                                                \
        (ip6addr)->addr[2] = 0;                                                \
        (ip6addr)->addr[3] = 0;                                                \
        ip6_addr_clear_zone(ip6addr);                                          \
    } while (0)

/** Set address to ipv6 'any' (no need for lwip_htonl()) */
#define ip6_addr_set_any(ip6addr) ip6_addr_set_zero(ip6addr)
/** Set address to ipv6 loopback address */
#define ip6_addr_set_loopback(ip6addr)                                         \
    do {                                                                       \
        (ip6addr)->addr[0] = 0;                                                \
        (ip6addr)->addr[1] = 0;                                                \
        (ip6addr)->addr[2] = 0;                                                \
        (ip6addr)->addr[3] = PP_HTONL(0x00000001UL);                           \
        ip6_addr_clear_zone(ip6addr);                                          \
    } while (0)
/** Safely copy one IPv6 address to another and change byte order
 * from host- to network-order. */
#define ip6_addr_set_hton(dest, src)                                           \
    do {                                                                       \
        (dest)->addr[0] = (src) == NULL ? 0 : lwip_htonl((src)->addr[0]);      \
        (dest)->addr[1] = (src) == NULL ? 0 : lwip_htonl((src)->addr[1]);      \
        (dest)->addr[2] = (src) == NULL ? 0 : lwip_htonl((src)->addr[2]);      \
        (dest)->addr[3] = (src) == NULL ? 0 : lwip_htonl((src)->addr[3]);      \
        ip6_addr_set_zone((dest),                                              \
                          (src) == NULL ? IP6_NO_ZONE : ip6_addr_zone(src));   \
    } while (0)

/** @deprecated Renamed to @ref ip6_addr_net_zoneless_eq */
#define ip6_addr_netcmp_zoneless(addr1, addr2)                                 \
    ip6_addr_net_zoneless_eq(addr1, addr2)
/** Compare IPv6 networks, ignoring zone information. To be used sparingly! */
#define ip6_addr_net_zoneless_eq(addr1, addr2)                                 \
    (((addr1)->addr[0] == (addr2)->addr[0]) &&                                 \
     ((addr1)->addr[1] == (addr2)->addr[1]))

/**
 * Determine if two IPv6 address are on the same network.
 * @deprecated Renamed to @ref ip6_addr_net_eq
 */
#define ip6_addr_netcmp(addr1, addr2) ip6_addr_net_eq(addr1, addr2)
/**
 * Determine if two IPv6 address are on the same network.
 *
 * @param addr1 IPv6 address 1
 * @param addr2 IPv6 address 2
 * @return 1 if the network identifiers of both address match, 0 if not
 */
#define ip6_addr_net_eq(addr1, addr2)                                          \
    (ip6_addr_net_zoneless_eq((addr1), (addr2)) &&                             \
     ip6_addr_zone_eq((addr1), (addr2)))

#define ip6_addr_nethostcmp(addr1, addr2) ip6_addr_nethost_eq(addr1, addr2)
/* Exact-host comparison *after* ip6_addr_net_eq() succeeded, for efficiency. */
#define ip6_addr_nethost_eq(addr1, addr2)                                      \
    (((addr1)->addr[2] == (addr2)->addr[2]) &&                                 \
     ((addr1)->addr[3] == (addr2)->addr[3]))

/** @deprecated Renamed to @ref ip6_addr_zoneless_eq */
#define ip6_addr_cmp_zoneless(addr1, addr2) ip6_addr_zoneless_eq(addr1, addr2)
/** Compare IPv6 addresses, ignoring zone information. To be used sparingly! */
#define ip6_addr_zoneless_eq(addr1, addr2)                                     \
    (((addr1)->addr[0] == (addr2)->addr[0]) &&                                 \
     ((addr1)->addr[1] == (addr2)->addr[1]) &&                                 \
     ((addr1)->addr[2] == (addr2)->addr[2]) &&                                 \
     ((addr1)->addr[3] == (addr2)->addr[3]))
/** @deprecated Renamed to @ref ip6_addr_eq */
#define ip6_addr_cmp(addr1, addr2) ip6_addr_eq(addr1, addr2)
/**
 * Determine if two IPv6 addresses are the same. In particular, the address
 * part of both must be the same, and the zone must be compatible.
 *
 * @param addr1 IPv6 address 1
 * @param addr2 IPv6 address 2
 * @return 1 if the addresses are considered equal, 0 if not
 */
#define ip6_addr_eq(addr1, addr2)                                              \
    (ip6_addr_zoneless_eq((addr1), (addr2)) &&                                 \
     ip6_addr_zone_eq((addr1), (addr2)))

/** @deprecated Renamed to @ref ip6_addr_packed_eq */
#define ip6_addr_cmp_packed(ip6addr, paddr, zone_idx)                          \
    ip6_addr_packed_eq(ip6addr, paddr, zone_idx)
/** Compare IPv6 address to packed address and zone */
#define ip6_addr_packed_eq(ip6addr, paddr, zone_idx)                           \
    (((ip6addr)->addr[0] == (paddr)->addr[0]) &&                               \
     ((ip6addr)->addr[1] == (paddr)->addr[1]) &&                               \
     ((ip6addr)->addr[2] == (paddr)->addr[2]) &&                               \
     ((ip6addr)->addr[3] == (paddr)->addr[3]) &&                               \
     ip6_addr_equals_zone((ip6addr), (zone_idx)))

#define ip6_get_subnet_id(ip6addr)                                             \
    (lwip_htonl((ip6addr)->addr[2]) & 0x0000ffffUL)

#define ip6_addr_isany_val(ip6addr)                                            \
    (((ip6addr).addr[0] == 0) && ((ip6addr).addr[1] == 0) &&                   \
     ((ip6addr).addr[2] == 0) && ((ip6addr).addr[3] == 0))
#define ip6_addr_isany(ip6addr)                                                \
    (((ip6addr) == NULL) || ip6_addr_isany_val(*(ip6addr)))

#define ip6_addr_isloopback(ip6addr)                                           \
    (((ip6addr)->addr[0] == 0UL) && ((ip6addr)->addr[1] == 0UL) &&             \
     ((ip6addr)->addr[2] == 0UL) &&                                            \
     ((ip6addr)->addr[3] == PP_HTONL(0x00000001UL)))

#define ip6_addr_isglobal(ip6addr)                                             \
    (((ip6addr)->addr[0] & PP_HTONL(0xe0000000UL)) == PP_HTONL(0x20000000UL))

#define ip6_addr_islinklocal(ip6addr)                                          \
    (((ip6addr)->addr[0] & PP_HTONL(0xffc00000UL)) == PP_HTONL(0xfe800000UL))

#define ip6_addr_issitelocal(ip6addr)                                          \
    (((ip6addr)->addr[0] & PP_HTONL(0xffc00000UL)) == PP_HTONL(0xfec00000UL))

#define ip6_addr_isuniquelocal(ip6addr)                                        \
    (((ip6addr)->addr[0] & PP_HTONL(0xfe000000UL)) == PP_HTONL(0xfc000000UL))

#define ip6_addr_isipv4mappedipv6(ip6addr)                                     \
    (((ip6addr)->addr[0] == 0) && ((ip6addr)->addr[1] == 0) &&                 \
     (((ip6addr)->addr[2]) == PP_HTONL(0x0000FFFFUL)))

#define ip6_addr_isipv4compat(ip6addr)                                         \
    (((ip6addr)->addr[0] == 0UL) && ((ip6addr)->addr[1] == 0UL) &&             \
     ((ip6addr)->addr[2] == 0UL) && (htonl((ip6addr)->addr[3]) > 1))

#define ip6_addr_ismulticast(ip6addr)                                          \
    (((ip6addr)->addr[0] & PP_HTONL(0xff000000UL)) == PP_HTONL(0xff000000UL))
#define ip6_addr_multicast_transient_flag(ip6addr)                             \
    ((ip6addr)->addr[0] & PP_HTONL(0x00100000UL))
#define ip6_addr_multicast_prefix_flag(ip6addr)                                \
    ((ip6addr)->addr[0] & PP_HTONL(0x00200000UL))
#define ip6_addr_multicast_rendezvous_flag(ip6addr)                            \
    ((ip6addr)->addr[0] & PP_HTONL(0x00400000UL))
#define ip6_addr_multicast_scope(ip6addr)                                      \
    ((lwip_htonl((ip6addr)->addr[0]) >> 16) & 0xf)
#define IP6_MULTICAST_SCOPE_RESERVED 0x0
#define IP6_MULTICAST_SCOPE_RESERVED0 0x0
#define IP6_MULTICAST_SCOPE_INTERFACE_LOCAL 0x1
#define IP6_MULTICAST_SCOPE_LINK_LOCAL 0x2
#define IP6_MULTICAST_SCOPE_RESERVED3 0x3
#define IP6_MULTICAST_SCOPE_ADMIN_LOCAL 0x4
#define IP6_MULTICAST_SCOPE_SITE_LOCAL 0x5
#define IP6_MULTICAST_SCOPE_ORGANIZATION_LOCAL 0x8
#define IP6_MULTICAST_SCOPE_GLOBAL 0xe
#define IP6_MULTICAST_SCOPE_RESERVEDF 0xf
#define ip6_addr_ismulticast_iflocal(ip6addr)                                  \
    (((ip6addr)->addr[0] & PP_HTONL(0xff8f0000UL)) == PP_HTONL(0xff010000UL))
#define ip6_addr_ismulticast_linklocal(ip6addr)                                \
    (((ip6addr)->addr[0] & PP_HTONL(0xff8f0000UL)) == PP_HTONL(0xff020000UL))
#define ip6_addr_ismulticast_adminlocal(ip6addr)                               \
    (((ip6addr)->addr[0] & PP_HTONL(0xff8f0000UL)) == PP_HTONL(0xff040000UL))
#define ip6_addr_ismulticast_sitelocal(ip6addr)                                \
    (((ip6addr)->addr[0] & PP_HTONL(0xff8f0000UL)) == PP_HTONL(0xff050000UL))
#define ip6_addr_ismulticast_orglocal(ip6addr)                                 \
    (((ip6addr)->addr[0] & PP_HTONL(0xff8f0000UL)) == PP_HTONL(0xff080000UL))
#define ip6_addr_ismulticast_global(ip6addr)                                   \
    (((ip6addr)->addr[0] & PP_HTONL(0xff8f0000UL)) == PP_HTONL(0xff0e0000UL))

/* Scoping note: while interface-local and link-local multicast addresses do
 * have a scope (i.e., they are meaningful only in the context of a particular
 * interface), the following functions are not assigning or comparing zone
 * indices. The reason for this is backward compatibility. Any call site that
 * produces a non-global multicast address must assign a multicast address as
 * appropriate itself. */

#define ip6_addr_isallnodes_iflocal(ip6addr)                                   \
    (((ip6addr)->addr[0] == PP_HTONL(0xff010000UL)) &&                         \
     ((ip6addr)->addr[1] == 0UL) && ((ip6addr)->addr[2] == 0UL) &&             \
     ((ip6addr)->addr[3] == PP_HTONL(0x00000001UL)))

#define ip6_addr_isallnodes_linklocal(ip6addr)                                 \
    (((ip6addr)->addr[0] == PP_HTONL(0xff020000UL)) &&                         \
     ((ip6addr)->addr[1] == 0UL) && ((ip6addr)->addr[2] == 0UL) &&             \
     ((ip6addr)->addr[3] == PP_HTONL(0x00000001UL)))
#define ip6_addr_set_allnodes_linklocal(ip6addr)                               \
    do {                                                                       \
        (ip6addr)->addr[0] = PP_HTONL(0xff020000UL);                           \
        (ip6addr)->addr[1] = 0;                                                \
        (ip6addr)->addr[2] = 0;                                                \
        (ip6addr)->addr[3] = PP_HTONL(0x00000001UL);                           \
        ip6_addr_clear_zone(ip6addr);                                          \
    } while (0)

#define ip6_addr_isallrouters_linklocal(ip6addr)                               \
    (((ip6addr)->addr[0] == PP_HTONL(0xff020000UL)) &&                         \
     ((ip6addr)->addr[1] == 0UL) && ((ip6addr)->addr[2] == 0UL) &&             \
     ((ip6addr)->addr[3] == PP_HTONL(0x00000002UL)))
#define ip6_addr_set_allrouters_linklocal(ip6addr)                             \
    do {                                                                       \
        (ip6addr)->addr[0] = PP_HTONL(0xff020000UL);                           \
        (ip6addr)->addr[1] = 0;                                                \
        (ip6addr)->addr[2] = 0;                                                \
        (ip6addr)->addr[3] = PP_HTONL(0x00000002UL);                           \
        ip6_addr_clear_zone(ip6addr);                                          \
    } while (0)

#define ip6_addr_issolicitednode(ip6addr)                                      \
    (((ip6addr)->addr[0] == PP_HTONL(0xff020000UL)) &&                         \
     ((ip6addr)->addr[2] == PP_HTONL(0x00000001UL)) &&                         \
     (((ip6addr)->addr[3] & PP_HTONL(0xff000000UL)) ==                         \
      PP_HTONL(0xff000000UL)))

#define ip6_addr_set_solicitednode(ip6addr, if_id)                             \
    do {                                                                       \
        (ip6addr)->addr[0] = PP_HTONL(0xff020000UL);                           \
        (ip6addr)->addr[1] = 0;                                                \
        (ip6addr)->addr[2] = PP_HTONL(0x00000001UL);                           \
        (ip6addr)->addr[3] = (PP_HTONL(0xff000000UL) | (if_id));               \
        ip6_addr_clear_zone(ip6addr);                                          \
    } while (0)

#define ip6_addr_cmp_solicitednode(ip6addr, sn_addr)                           \
    ip6_addr_solicitednode_eq(ip6addr, sn_addr)
#define ip6_addr_solicitednode_eq(ip6addr, sn_addr)                            \
    (((ip6addr)->addr[0] == PP_HTONL(0xff020000UL)) &&                         \
     ((ip6addr)->addr[1] == 0) &&                                              \
     ((ip6addr)->addr[2] == PP_HTONL(0x00000001UL)) &&                         \
     ((ip6addr)->addr[3] == (PP_HTONL(0xff000000UL) | (sn_addr)->addr[3])))

/* IPv6 address states. */
#define IP6_ADDR_INVALID 0x00
#define IP6_ADDR_TENTATIVE 0x08
#define IP6_ADDR_TENTATIVE_1 0x09 /* 1 probe sent */
#define IP6_ADDR_TENTATIVE_2 0x0a /* 2 probes sent */
#define IP6_ADDR_TENTATIVE_3 0x0b /* 3 probes sent */
#define IP6_ADDR_TENTATIVE_4 0x0c /* 4 probes sent */
#define IP6_ADDR_TENTATIVE_5 0x0d /* 5 probes sent */
#define IP6_ADDR_TENTATIVE_6 0x0e /* 6 probes sent */
#define IP6_ADDR_TENTATIVE_7 0x0f /* 7 probes sent */
#define IP6_ADDR_VALID                                                         \
    0x10 /* This bit marks an address as valid (preferred or deprecated) */
#define IP6_ADDR_PREFERRED 0x30
#define IP6_ADDR_DEPRECATED 0x10 /* Same as VALID (valid but not preferred) */
#define IP6_ADDR_DUPLICATED 0x40 /* Failed DAD test, not valid */

#define IP6_ADDR_TENTATIVE_COUNT_MASK 0x07 /* 1-7 probes sent */

#define ip6_addr_isinvalid(addr_state) (addr_state == IP6_ADDR_INVALID)
#define ip6_addr_istentative(addr_state) (addr_state & IP6_ADDR_TENTATIVE)
#define ip6_addr_isvalid(addr_state)                                           \
    (addr_state &                                                              \
     IP6_ADDR_VALID) /* Include valid, preferred, and deprecated. */
#define ip6_addr_ispreferred(addr_state) (addr_state == IP6_ADDR_PREFERRED)
#define ip6_addr_isdeprecated(addr_state) (addr_state == IP6_ADDR_DEPRECATED)
#define ip6_addr_isduplicated(addr_state) (addr_state == IP6_ADDR_DUPLICATED)

#if LWIP_IPV6_ADDRESS_LIFETIMES
#define IP6_ADDR_LIFE_STATIC (0)
#define IP6_ADDR_LIFE_INFINITE (0xffffffffUL)
#define ip6_addr_life_isstatic(addr_life) ((addr_life) == IP6_ADDR_LIFE_STATIC)
#define ip6_addr_life_isinfinite(addr_life)                                    \
    ((addr_life) == IP6_ADDR_LIFE_INFINITE)
#endif /* LWIP_IPV6_ADDRESS_LIFETIMES */

#define ip6_addr_debug_print_parts(debug, a, b, c, d, e, f, g, h)              \
    LWIP_DEBUGF(debug, ("%" X16_F ":%" X16_F ":%" X16_F ":%" X16_F ":%" X16_F  \
                        ":%" X16_F ":%" X16_F ":%" X16_F,                      \
                        a, b, c, d, e, f, g, h))
#define ip6_addr_debug_print(debug, ipaddr)                                    \
    ip6_addr_debug_print_parts(                                                \
        debug, (u16_t)((ipaddr) != NULL ? IP6_ADDR_BLOCK1(ipaddr) : 0),        \
        (u16_t)((ipaddr) != NULL ? IP6_ADDR_BLOCK2(ipaddr) : 0),               \
        (u16_t)((ipaddr) != NULL ? IP6_ADDR_BLOCK3(ipaddr) : 0),               \
        (u16_t)((ipaddr) != NULL ? IP6_ADDR_BLOCK4(ipaddr) : 0),               \
        (u16_t)((ipaddr) != NULL ? IP6_ADDR_BLOCK5(ipaddr) : 0),               \
        (u16_t)((ipaddr) != NULL ? IP6_ADDR_BLOCK6(ipaddr) : 0),               \
        (u16_t)((ipaddr) != NULL ? IP6_ADDR_BLOCK7(ipaddr) : 0),               \
        (u16_t)((ipaddr) != NULL ? IP6_ADDR_BLOCK8(ipaddr) : 0))
#define ip6_addr_debug_print_val(debug, ipaddr)                                \
    ip6_addr_debug_print_parts(                                                \
        debug, IP6_ADDR_BLOCK1(&(ipaddr)), IP6_ADDR_BLOCK2(&(ipaddr)),         \
        IP6_ADDR_BLOCK3(&(ipaddr)), IP6_ADDR_BLOCK4(&(ipaddr)),                \
        IP6_ADDR_BLOCK5(&(ipaddr)), IP6_ADDR_BLOCK6(&(ipaddr)),                \
        IP6_ADDR_BLOCK7(&(ipaddr)), IP6_ADDR_BLOCK8(&(ipaddr)))

#define IP6ADDR_STRLEN_MAX 46

int ip6addr_aton(const char *cp, ip6_addr_t *addr);
/** returns ptr to static buffer; not reentrant! */
char *ip6addr_ntoa(const ip6_addr_t *addr);
char *ip6addr_ntoa_r(const ip6_addr_t *addr, char *buf, int buflen);

#ifdef __cplusplus
}
#endif

#endif /* LWIP_IPV6 */

#endif /* LWIP_HDR_IP6_ADDR_H */
